JPH05147462A - Height adjusting mechanism of seat for automobile - Google Patents

Abstract

PURPOSE:To reduce the number of parts and reduce dimension and weight without deteriorating the essential drive feeling of a seat, by installing the driving mechanism of a height adjusting mechanism on a seat cushion frame side. CONSTITUTION:Sector gears 4 and 5 for forward and rearward tilt are installed in turnable manner on the brackets 2 and 3 installed on an upper rail 1 of a slife rail and meshed with the gear mechanisms 7 and 8. The turning power of a motor or the manual operation is transmitted to the gear mechanisms 7 and 8, and the sector gears 4 and 5 are driven by the revolution of the output shafts 9 and 10, and the part on the opposite siode to a gear shaped part acts an the slide rail, and a cushion frame 6 is vertically moved. Accordingly, the number of parts is reduced, and the dimension and weight can be reduced, and the essential drive feeling of a seat can be held.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a height adjusting mechanism in a seating posture adjusting mechanism of an automobile seat.

[0002]

2. Description of the Related Art Japanese Unexamined Utility Model Publication No. 64-36233 and Japanese Unexamined Utility Model Publication No. 1-62139 disclose conventional height adjusting mechanisms for automobile seats. In these conventional techniques, a height adjusting mechanism for an automobile seat is attached via an upper rail and a seat cushion frame.

By the way, the position of the seat and the seating position of the car which has been marketed in recent years and the car which will be marketed in the future have been lowered due to the height reduction of the vehicle. In addition, the second cross member to which the lower rail is attached has been increased in size in order to increase the rigidity of the vehicle body. As a result, the space between the body floor and the seat cushion is becoming smaller.

[0004]

A seating posture adjusting mechanism for adjusting the seating posture must be installed in the space between the body floor and the seat cushion, but as described above, this space becomes narrower. Therefore, if the seating posture adjusting mechanism layout as in the prior art is used, there is a problem that it may interfere with the lower surface of the seat cushion and impair the original riding comfort of the seat.

Further, in the seating posture adjusting mechanism of the prior art, the driving mechanism for the height adjusting mechanism is attached via the upper rail and the seat cushion frame, so that the structure becomes complicated and the number of parts is reduced. There is a problem in that the weight increases as the number increases.

The present invention has been made in view of the above circumstances, and provides a height adjusting mechanism for an automobile seat that does not impair the original riding comfort of the seat, and can reduce the number of parts and reduce the size and weight. The purpose is to do.

[0007]

In order to achieve the above object, the present invention is characterized in that in a vehicle seat with a seating posture adjusting mechanism, a drive mechanism of a height adjusting mechanism is attached to a seat cushion frame side. I am trying.

[0008]

With the above structure, since the drive mechanism for the height adjusting mechanism such as the gear box is attached to the seat cushion side, the number of parts can be reduced, the size and weight can be reduced, and the height of the vehicle can be lowered. Also, in this case, the seating posture adjusting mechanism can be disposed between the body floor and the seat cushion without difficulty, and the original riding comfort of the seat is not impaired.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an embodiment according to the present invention. In FIG. 1, a height adjustment mechanism (lift mechanism or front / rear tilt mechanism) is attached via brackets 2 and 3 on an upper rail 1 of a slide rail attached to a body floor via a bracket.

Here, the height adjusting mechanism includes the brackets 2,
3 includes a front tilt sector gear 4, a rear tilt sector gear 5, which are rotatably mounted on the seat 3, and a front tilt gear mechanism 7, a rear tilt gear mechanism 8, and output shafts 9 and 10 which are mounted on the seat cushion frame 6. ing.

In the height adjusting mechanism, a driving mechanism is composed of the front tilt gear mechanism 7, the rear tilt gear mechanism 8, the output shafts 9 and 10, and the like, and the driving mechanism is a part of the height adjusting mechanism. Is attached to the seat cushion frame 6.

Then, the front and rear tilt gear mechanisms (gear boxes) 7 and 8 are driven to move the front and rear tilt sector gears 4 and 5 via the output shafts 9 and 10. In the case of a power seat, In the case of a manual seat, the front and rear tilt gear mechanisms 7 and 8 are moved by a motor, and the front and rear tilt gear mechanisms 7 and 8 are manually moved to change the seat height.

That is, in the case of the power seat, the rotational force of the motor, and in the case of the manual seat, the force of manually turning the dial is transmitted to the front and rear tilt gear mechanisms 7 and 8.
Then, the output shafts 9 and 10 rotate to move the front and rear tilt sector gears 4 and 5. Then, the portions of the front and rear tilt sector gears 4 and 5 on the side opposite to the tooth-forming portions act on the slide rails, and the reaction force causes the seat cushion frame to move up and down.

In this embodiment, since the front and rear tilt gear mechanisms (gear boxes) 7 and 8 are attached to the seat cushion frame, the number of parts can be reduced, the size and weight can be reduced, and the low cost can be achieved. This mechanism can be incorporated without impairing the original riding comfort of the seat even when the vehicle height is increasing.

Further, since the member or bracket for attaching the motor in the case of the power seat and the manual operation lever in the case of the manual seat is integrated with the seat cushion frame or attached to the seat cushion frame,
From this point as well, the number of parts can be reduced, the size and weight can be reduced, and the mechanism can be incorporated without impairing the original riding comfort of the seat even when the vehicle height tends to be low.

[0016]

As described above, according to the present invention, since the drive mechanism for the height adjusting mechanism such as the gear box is attached to the seat cushion side, the number of parts can be reduced, and the size and weight can be reduced. Even when the vehicle height is lowered, the seating posture adjusting mechanism can be comfortably arranged between the body floor and the seat cushion, and the original riding comfort of the seat is not impaired.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment according to the present invention.

[Explanation of symbols]

 1 Upper Rail 4 Sector Gear for Front Tilt 5 Sector Gear for Rear Tilt 6 Seat Cushion Frame 7 Front Tilt Gear Mechanism 8 Rear Tilt Gear Mechanism 9 Output Shaft 10 Output Shaft

Claims (1)

[Claims] 1. A height adjusting mechanism for a vehicle seat, wherein a drive mechanism of the height adjusting mechanism is attached to a seat cushion frame side in a vehicle seat with a seating posture adjusting mechanism.